August lxuter



Jime 26,1928. Re. 11,012

A. LAUFER WHIRLPOOL FILLING AND PARRYING PLANT Original Filed Dec. 10,1921 YINVENTOR.

M A TTORNEY' Reissuecl June 26, 1928.

, u NITED TA ES -AUGUST L liUFER, OF. VIENNA, AUSTRIA.

wnIBLPoo FILLING Ann PARRYING PLANT.

Original No. 1,544,996, dated July 7, 1925, Serial No, 521,492. filedDecember 10, 1921, and in Austria January 18, 1921. Application forreissue filed May 15,1928. Serial No. 276,719.

This invention relates to a whirlpool filling and parrying plantdesigned to prevent damages caused by the \v'hirlpool behind (onthedown-stream side of) a construction such as a weir, in the water.

By weir as used herein is meant any construction used for holding backor impounding the waters of a flowing stream or other body of water andover or pastwhich water, at least at certain periods, will flow. Theterm therefore includes gates and other barrage constructions. I

According to the present invention a suc tion channel is provided, whichis located in front of on the lip-stream side of) a protesting plate, inorderto utilize the power of the water falling; over the constructionfor sucking off the water from below the protecting plate for producingthe drifting of broken stones or gii'avel by t-heproduction of an eddycurrent moving towards the weir and thereby preventing consequentexcai'ation of the bottom of the stream or tailrace just below the weir.

A few modes of carrying outthe present invention are shown, by way ofexample, in the accon'ip anying drawing in'which Fith.

section and plan View respectively, the device as appliedto a fixedweir. 1

3 shows a modifiedconstruction of a weir with the end of the suctionchannel terminating; in the rarefied space.

, Fig. 4 illustrates the application of the device to a sluice weir-orgate.

The plant comprises a protecting apron or plate to deflectthe fallingwater stream from the bottom of the stream bed and transform it into aharmless wavy stream, the plate and weir being so arranged that: an eddyor counter'current will be produced beneath the plate moving upstreamover the stream bed. U H

The root of the protecting plate a is not built directlyfagainstthe'body of the weir, but begins some distance away from the bodyportionof the masonry of the weir, so that the space thus formed betweenthe said body portion and the root of the plate may act as a suctionchannel for sucking in the water from the space 6 below the plate andthus upstream from the downstream end of such space, and this may beaccomplished by inclining the. upper end of the channel I) in adownstream direction or the 1 and 2 illustrate in longitudinal dit-ionsis illustrated bythe arrows in 3 wherein the arrows 10 indicate thedownupper mouth of the suction channel may terininatezin a rarefiedspace 1 such as is frequently produced under certain conditions belowthe falling stream.

The characteristic feature of the plant according to the presentinvention consists in that the effect of'suction of the falling 1 streamis utilized to produce a current along the under side of thepla-te a andat the bottom of the space 0 which is directed towards the weir (Z, thesaid currentcausing a considerable drift of broken :stones c or graveltowards the weir and producingan eddy which will 'carry much of anysolid material transported over the structure upstream beneath theprotecting plate where it will be deposited. I The power which isthuspro duced by the falling stream diminishes the iuertia'orinherent energyof said falling stream, thereby reducing its damaging effect; In orderto adapt the deflection and transformation. of the falling stream tolocal conditions and at the same time to facilitate the sucking effect,the plate a may be of straight or curved formation and movable orimmovable. This plate is spaced away slightly from the base of the weir,leaving a narrow spaceb." The necessary inclination of the plate withrespect to the falling stream may beadjusted by raising or lowering thesame by means of suitable arrangements, or the said plate may be raisedor lowered automatically by means of the floating moment or; the plate.The curvature of the plate'secures a constant, striking angle of thestream of water with Varying water levels, which has a decided influenceupon the action of the suction channel. The device may be executed inany desired material, for instance in con-' crete, iron or wood'constructions andso forth. The flow of water under these con Fig.

stream flow and the arrows 11 indicate the upstream. eddy produced bythe suction through the passage b.

1. A weir having an extension downstream from itsdownstream side andoverhanging the stream bed in spaced relation thereto to form a chamberunder said exhis tension,said weir having a suction passage leading fromthe chamber and having a mouth opening through the structure in pmprotecting plate secured in spaced relation sition to have water passingthe weir flow past said mouth to effect suction in an upward'di'rectionthrough the passage and in an upstream'direction beneath the overhangingextension.

2. A weir having an extension downstream from its downstream side andover-- hanging the, stream bed in spaced-relation thereto to form achamber under said extension, said weir having a suction passage leadingfrom the chamber and having a mouth opening through the structure inposition to' have water passing the weir flow past said mouth to effectsuction in an upward direction through the passage and in anupstreamdirection beneath the overhanging extensiomsaidextensioncomprising a to the body of the weir whereby the space between the plateand body of the weir forms the suctionpassage. v

3.,A weir having an extension downstream from its downstream side andoverhanging the stream bed in spaced relation thereto to form achamberunder said extension, said weir having a suction passage leading fromthe chamber and having a ,mouth opening through the structure inposition' tohave water'passing the weir flow .past said mouthto effectsuction in an upward direction through the passage and in an upstreamdirection beneath the overhanging extension, said extension comprising aprotecting plate secured in spaced relation to the body of the weirwhereby the space between the plate and body ofthe weir forms thesuction passage, said plate being inclined to have its downstream edgehigher than the edge adjacent the body of the weir.

4. A weir having an extension downstream from its downstream side andoverhanging the stream bed in spaced relation theretoflto form a chamberunder said extension, said weir having a suction passage leading fromthe chamber and having a mouth opening through the structure in positionto have water passing the weir flow past said mouth to eflect suction inan upward direction through the passage and in an upstream directionbeneath the overhanging fextension, said extension comprising aprotecting plate secured in spaced relation to the" bodyof the weirwhereby the space between the plate and body of the weir forms thesuction passage, said plate being arcuately curved to have itsdownstream edge higher than the edge adjacent the body of the weir.

. 5 .,A1. weir having an extension downstream from its downstream sideand overhanging the stream bed in spaced relation thereto to form achamber under said extension, said weir having a suction passage leadingfrom the chamber and having a mouth opening through the structure inposit-ion to have water passing theweir flow past said mouth to eifectsuction in an upward direction through the passage and in an upstreamdirection beneath the overhanging extension, said extension comprising aprotecting platesecured in spaced relation to the'body of the weirwhereby the space between the plate and body of the weirforms thesuction passage, said plate being hinged to effect suction in an upwarddirection through the passage and in an upstream direction beneath theoverhanging extension,

said extension comprising a protecting plate secured in spaced relationto the body. of the weir whereby the space between the plate and body ofthe weir forms the suction passage, said plate being inclined to haveits downstream edge higher than the edge adjacent the body of the weir,said plate being hinged at its upstream edge to permit verticaladjustment of its downstream edge. 7. A weir having an extensiondownstream from its downstream" side and overhanging'the stream bed inspaced relation thereto to form a chamber under said extension, saidweir having a suction passage leading from the chamber and having amouth opening through the structure in position to have water passingthe weir flow past said mouth to effect suction in an upward directionthrough the passage and in an upstream direction beneath the overhangingextension, said extension comprising a protecting plate secured inspaced relation to the bodyof the weir whereby the space between theplate and body of the weir forms the suction passage, said plate beingarouately curved to have its d0wnstream edge higher than the edgeadjacent the body of the weir, said plate being hinged at its upstreamedge to permit vertical adjustment of itsdownstream edge.

. AUGUST LAUFER.

